 What is a safe vacuum value to test a MPS?, ...aka the value of looking at VW shows for teener stuff! |
|
|
|
Porsche, and the Porsche crest are registered trademarks of Dr. Ing. h.c. F. Porsche AG.
This site is not affiliated with Porsche in any way. Its only purpose is to provide an online forum for car enthusiasts. All other trademarks are property of their respective owners. |
|
|
| 914rrr |
 Sep 7 2025, 07:00 PM
Post
#1
|
|
Senior Member  Group: Members Posts: 1,976 Joined: 1-July 03 From: Knoxville, TN Member No.: 874 Region Association: South East States  |
While cruising the swap meet section at a VW Show yesterday, I picked up an in the box NOS 049 MPS. (IMG:style_emoticons/default/dancinnanner.gif)
I did the :suck tongue" test and it passed. I'd like to test it with a pressure / vacuum tester to ensure it holds vacuum. I definitely don't want to overdo it and damage it. What is a safe vacuum value to test an MPS?  |
   |
 
|
  |
Replies
| JeffBowlsby |
Sep 7 2025, 08:18 PM
Post
#2
|
|
914 Wiring Harnesses & Beekeeper Group: Members Posts: 9,104 Joined: 7-January 03 From: San Ramon CA Member No.: 104 Region Association: None 
|
18 in/Hg is used to calibrate.
Mouth suck test is no good, no where near enough pressure. Use a vacuum pump. |
 |
|
| 914rrr |
Sep 8 2025, 12:42 PM
Post
#3
|
|
Senior Member Group: Members Posts: 1,976 Joined: 1-July 03 From: Knoxville, TN Member No.: 874 Region Association: South East States |
QUOTE(JeffBowlsby @ Sep 7 2025, 10:18 PM)  18 in/Hg is used to calibrate. Mouth suck test is no good, no where near enough pressure. Use a vacuum pump. Thanks Jeff!! |
|
|
|
Posts in this topic
914rrr What is a safe vacuum value to test a MPS? Sep 7 2025, 07:00 PM
914rrr OK, it passed the vacuum text with flying colors. ... Oct 30 2025, 09:02 AM Ron914
OK, it passed the vacuum text with flying colors.... Oct 30 2025, 09:51 AM |
1 User(s) are reading this topic (1 Guests and 0 Anonymous Users)
0 Members:
|
Lo-Fi Version | Time is now: 3rd November 2025 - 12:03 AM |
Invision Power Board
v9.1.4 © 2025 IPS, Inc.